tableout.js

//tableout.js -- Beau Vandenburgh
//converts an array of objects or a 2d array into a fancy spaced out table
//MIT liscence

function tableout (data,padding_val){
  if(+padding_val==NaN){
    console.info("The padding value (args[1]) is not a number, so it will default to 2. here's the trace:")
    console.trace()
    padding_val=2;
  }
  var resultstr="";
  if (!Array.isArray(data[0])) {//convert object to 2d array
    var newdata=[];
    var keys=[];
    for (var key in data[0]) {
      if (data[0].hasOwnProperty(key)) {
        keys.push(key);
      }
    }
    newdata[0]=keys;
    for (var i = 0; i < data.length; i++) {
      newdata[i+1]=[];
      for (var j = 0; j < keys.length; j++) {
        newdata[i+1][j]=data[i][keys[j]];
      }
    }
    data = newdata;
  }
  
  for (var i = 0; i < data.length; i++) {//convert each value to string
    for (var j = 0; j < data[i].length; j++) {
      data[i][j]=""+data[i][j];
    }
  }
  
  var collumns = [];
  for(var i = 0; i < data[0].length;i++){//collums coutns how many chars something is
    collumns[i] = 0;
  }
  
  for (var row = 0; row < data.length; row++) {//find the length of each collumn
    for (var cell = 0; cell < data[row].length; cell++) {
      if (data[row][cell].length+padding_val > collumns[cell]){
        collumns[cell]=data[row][cell].length+padding_val;
      }
    }
  }
  for (var cell = 0; cell < data[0].length; cell++) {
    resultstr+=data[0][cell];
    for (var j = 0; j < (collumns[cell]-data[0][cell].length); j++) {
      resultstr+=" ";
    }
  }
  for (var i = 1; i < data.length; i++) {//make the string
    resultstr+="\n";
    for (var cell = 0; cell < data[i].length; cell++) {
      resultstr+=data[i][cell];
      for (var j = 0; j < (collumns[cell]-data[i][cell].length); j++) {
        resultstr+=" ";
      }
    }
  }
  return resultstr;
}